2168747378 has 16 divisors (see below), whose sum is σ = 3818336064. Its totient is φ = 904342320.

The previous prime is 2168747359. The next prime is 2168747387. The reversal of 2168747378 is 8737478612.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2092868 + ... + 2093903.

It is an arithmetic number, because the mean of its divisors is an integer number (238646004).

Almost surely, 2^2168747378 is an apocalyptic number.

2168747378 is a deficient number, since it is larger than the sum of its proper divisors (1649588686).

2168747378 is a wasteful number, since it uses less digits than its factorization.

2168747378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4186817.

The product of its digits is 3161088, while the sum is 53.

The square root of 2168747378 is about 46569.8118742174. The cubic root of 2168747378 is about 1294.4034317846.

The spelling of 2168747378 in words is "two billion, one hundred sixty-eight million, seven hundred forty-seven thousand, three hundred seventy-eight".